| 1. | Estimates for the condition number of matrices
关于矩阵谱条件数的估计 |
| 2. | In chapter 3 , i analyze this algorithm and draw a conclusion its condition number is lower than cg algorithm ' s
推导出了它的条件数比原来系数矩阵的条件数要低。 |
| 3. | The optimal backward error and the condition number are important measures to evaluate the quality of computed solution
最佳向后误差和条件数都是衡量计算解质量的重要指标。 |
| 4. | But when the condition number of the matrix is very large , the round error will be accumulated to collapse the true solution , that is , the method is unstable
同时，当系数矩阵的非零元结构不规则或带宽较大时，其计算量与存储量十分大。 |
| 5. | Some preconditioner technique is also studied to improve the condition number and further accelerate iterations , comparisons are made between them by numerical results
本文还研究了几种预条件技术,用于改善算子的条件数,进一步加速迭代,同时用数值结果对比了各自的优劣。 |
| 6. | For electrically large problems , the condition number of impendence matrix is very large , and furthermore , the ununiformity of the modeling leads to an ill - conditioned matrix
对大型电磁散射问题,不仅矩阵的条件数大,而且由于表面网格剖分的不均匀有可能产生病态的矩阵。 |
| 7. | The feasibility of its avoidance from the actuating - singularity by means of step motors and mutation of mechanism is proven with the help of the condition number of the jacobian matrix
结合实例提出一种机构构形变异和驱动变异，其可以避免奇异中对机构影响最大的驱动奇异。 |
| 8. | The ordering process , the integer ldlt factorization and the ambiguity screen are three parts of the osd . the osd is based on diminishing the condition number of covariance matrix
Osd处理过程包括排序、整数ldl ~ t分解和模糊度筛选，该算法的去相关处理过程，是以降低协方差矩阵的条件数为准则。 |
| 9. | Then with implicit function theorem the flexible workspace is dealt with . by using the jacobian matrix of the hybrid input mechanism , the sensitivity of output is obtained . then the condition number of jacobian matrix is derived
进而研究平面闭链机构的柔性工作空间，并利用隐函数定理快速地推导出平面闭链5r和4rp机构的工作空间的边界条件。 |
| 10. | The examples show that the new scheme is very effective when the condition number of the normal matrix is less than 1010 . compared with other methods , the new scheme improves the precision and accuracy of the computation results obviously
经过实例验证，当法矩阵的条件数小于10 ~ ( 10 )时，这种方案是有效的，与其它方法相比较，显著地提高了计算结果的精度和准确度。 |
